Measurement ofD ⁰ decays into$\overline {K^0 } \omega$,$\overline {K^0 } \eta$ and$\overline {K^{*0} } \eta$

Abstract

Using the ARGUS detector at the electron-positron storage ring DORIS II at DESY, we have measured the branching ratios of theD ⁰ meson decays into$\overline {K^0 } \omega$,$\overline {K^0 } \eta$ and$\overline {K^{*0} } \eta$ relative to theK ⁻π⁺ mode. Using the known branching ratio Br(D ⁰→Kπ⁺)=(4.2±0.4±0.4)% we find$Br(D^0 \to \overline {K^0 } \omega ) = (4.2 \pm 1.6 \pm 0.9)\% ,Br(D^0 \to \overline {K^0 } \eta )< 2.7\%$ (90% CL) and$Br(D^0 \to \overline {K^{*0} } \eta )< 2.9\%$ (90% CL).